Kenneth R.
Cináed
hmmm yes and no. not necessarilySilentRealm said:(unless you're a creationist, then you think it was only 5000.)
I see your point though. For a civilization to be greater than our own, technology wise, means they had mastered the atomic structure, at least up to fission and electromagnetics and mechanics. For them to be more advanced, they would have to surpass us in one of these fields, evidence of which would be blatantly obvious, even if it was heavily destroyed.